Antibiotic

Early antibiotic exposure is an important environmental factor that disrupts the establishment of the infant gut microbiota and leads to microbial dysbiosis. Accumulating epidemiological evidence indicates that exposure to antibiotics early in life (including both prenatal and postnatal periods) is significantly associated with an increased risk of allergic diseases in childhood. As live microorganisms, probiotics hold potential as a preventive strategy against allergies due to their ability to stabilize the intestinal barrier and regulate immune balance (e.g., promoting Th1/Th2 balance, inducing regulatory T cells, and increasing sIgA secretion). However, current studies have mostly focused on general or high-risk infant populations. For the specific high-risk subgroup that has already been exposed to antibiotics early in life, high-quality randomized controlled trial evidence is still lacking regarding whether probiotic intervention can effectively reduce the incidence of allergies and whether it exerts its effects by reshaping the gut microbiota and metabolites disrupted by antibiotics. This study focuses on breastfed infants who received antibiotics during the early postnatal period (within 30 days after birth) and aims to investigate the effect of a probiotic mixture containing Bifidobacterium longum subsp. infantis R0033, Lactobacillus helveticus R0052, and Bifidobacterium bifidum R0071 on the development of allergic diseases after antibiotic exposure.

The objective of the study is to determine whether rapid multiplex PCR testing of respiratory samples can reduce exposure to broad-spectrum antibiotics in intensive care unit patients with suspected or confirmed ventilator-associated pneumonia, compared to standard diagnostic methods. As secondary objectives, the investigators will study antibiotic management and overall antibiotic consumption, as well as escalation or de-escalation events. The investigators will study the potential clinical impact of using multiplex PCR to see if the length of stay in the intensive care unit is reduced, as well as the duration of mechanical ventilation.

Respiratory infections are very common, especially during winter, and are often caused by viruses such as influenza, SARS-CoV-2 or respiratory syncytial virus (RSV). These illnesses are generally mild, but their symptoms do not always allow a clear distinction to be made between a viral infection and a bacterial infection. In the absence of a precise diagnosis, antibiotics may be prescribed when they are not necessary in many cases. However, the excessive use of antibiotics contributes to the development of bacterial resistance, which is a major public health issue. The aim of this study is to better understand whether the use of a rapid test (called TROD), which can quickly identify certain respiratory viruses, can help doctors reduce unnecessary antibiotic prescriptions for these infections. The test will be performed using a swab gently inserted into the nose.

Given the high burden of post-catheter removal UTIs, this study aims to evaluate Irrisept instillation as a non-antibiotic intervention to reduce infection rates. By comparing Irrisept to saline irrigation, the study will provide critical insights into the efficacy of antiseptic bladder irrigation in preventing UTIs while minimizing antibiotic use. If successful, this approach could lead to new clinical guidelines for catheter removal protocols, improving patient outcomes and reducing healthcare costs.

The aim of the present project (non-inferiority trial) is to evaluate the effect of different antibiotic strategies (long-span vs. short-span) for implant surgery on peri-implant tissue health, oral microbiome (included resistome) and salivary MiRNomics in healthy patients.